Despite the fact that he'll be going head-to-head against David Letterman when his late-night talk show moves from midnight to 11:35 p.m. next week, Jimmy Kimmel has nothing but good things to say about his new rival. But Jay Leno, on the other hand? Not so much.

"As a comedian, you can't not have disdain for what he's done: He totally sold out," Kimmel told Rolling Stone, as reported by the New York Daily News. "He was a master chef who opened a Burger King."

This isn't the first time Kimmel has blasted Leno. During the Tonight Showdebacle in 2010, Kimmel did a scathing impersonation of Leno on his show (check it out below) and slammed him while appearing on Leno's then-prime-time show. Leno later said he felt "sucker-punched" by Kimmel.

As for Letterman, who recently dissed Leno again, Kimmel says of his idol: "If I beat David Letterman in the ratings, does that mean I'm better than Letterman? No f---ing way."

Kimmel adds that he and fellow late-night host Jimmy Fallon are ready to eventually fill the Leno-Letterman rivalry void after the two retire.